How to Use Oven as Dehydrator

You don't need a dedicated dehydrator to make dried fruits, vegetables, jerky, or herbs at home. Your oven can do the job — it just requires a low temperature, good airflow, and patience. Here's exactly how to do it.

How Oven Dehydrating Works

Dehydrating removes moisture from food by exposing it to low, steady heat over several hours. The key is keeping the temperature low enough to dry the food without cooking it — typically 50–70°C (120–160°F). Most home ovens can reach these temperatures, though some struggle to go below 80°C — check your oven's minimum setting.

Setting Up Your Oven for Dehydrating

1. Set the oven to its lowest temperature — ideally 50–70°C (120–160°F). If your oven's minimum is higher, prop the door open slightly with a wooden spoon to allow moisture to escape and reduce the effective temperature.
2. Use fan mode if available — the circulating air speeds up moisture removal significantly and produces more even results.
3. Place food on wire racks over baking sheets — elevating food allows air to circulate underneath as well as above. The Ultra Cuisine Stainless Steel Cooling and Baking Rack Set (11.5x16.5 inch, Set of 2) is oven-safe and perfect for this — place it over a baking sheet to catch any drips.
4. Prop the door open slightly — this allows moisture-laden air to escape, which is essential for effective dehydrating. A wooden spoon or folded tea towel works well.

Dehydrating Times and Temperatures by Food

Fruits

• Apple slices: 60°C / 140°F — 6–8 hours
• Banana slices: 60°C / 140°F — 6–8 hours
• Strawberries (halved): 60°C / 140°F — 8–10 hours
• Mango slices: 60°C / 140°F — 8–12 hours
• Tomatoes (halved cherry): 70°C / 160°F — 8–12 hours

Vegetables

• Courgette / zucchini slices: 60°C / 140°F — 6–8 hours
• Mushrooms (sliced): 60°C / 140°F — 6–8 hours
• Kale chips: 70°C / 160°F — 2–3 hours
• Beetroot slices: 70°C / 160°F — 8–10 hours

Meat (Jerky)

• Beef jerky: 70°C / 160°F — 4–6 hours (slice thinly against the grain, marinate first)
• Always ensure jerky reaches an internal temperature of 70°C / 160°F for food safety

Preparation Tips

• Slice food uniformly — even thickness ensures even drying
• Thinner slices (3–5mm) dry faster and more evenly
• Pat food dry before placing in the oven to remove surface moisture
• Rotate trays and flip food every 2–3 hours for even results

For Dedicated Dehydrating: Mesh Trays

If you dehydrate regularly, dedicated mesh dehydrator trays give better airflow than standard wire racks. The Baderke Stainless Steel Dehydrator Drying Mesh Screens (4 Pcs, 13x12 inch) fit inside most standard ovens and provide excellent airflow for even, efficient drying of fruits, vegetables, and herbs.

How to Tell When Food Is Fully Dehydrated

• Fruits: leathery and pliable, no moisture when squeezed
• Vegetables: crisp and brittle
• Jerky: firm and chewy, bends without breaking, no moisture visible

Storage

Allow dehydrated food to cool completely before storing. Store in airtight containers or mason jars in a cool, dark place. Properly dehydrated food lasts 6–12 months. The Mason Jars 24 Pack with Regular Lids (4oz, 8oz, 12oz) are ideal for storing dehydrated fruits, vegetables, and herbs — airtight, stackable, and available in multiple sizes.

Summary

Set your oven to 50–70°C (120–160°F), use fan mode, prop the door open slightly, and place food on wire racks over baking sheets. Most fruits and vegetables take 6–12 hours. The result is shelf-stable, flavour-concentrated food without any specialist equipment.